Their escape in locomotives



UNTTED sTATEs PATENT oEEroE.

IVM. \V. I-IUBBELL, OF MOYAMFNSING. PENNSYLVANIA, ASSIGNGR TO LEONARDPHLEGER.

IVIANNER OF CONSTRUCTING APPARATUS FOR ARRESTING SPARKS .AND PREVENTINGTHEIR ESCAPE IN LOCOMOTIVES, @5o.

Specification of Letters Patent No. 2,142, dated June 26, 1841.

f b alf 11i/wm t may concern Be it known that I, IVILLIAM IV. I-IUB-BELL, of Moyamensing, in the county of Philadelphia and State ofPennsylvania, have invented a new and useful lVIanner of ConstructingSpark-Arresters or Instruments for Preventing the Escape of Sparks fromthe Chimneys of Locomotive or other Seam-Engines; and I do herebydeclare that the following is a full and exact description ther-eof.

The chimney of my spark arrester, when used on locomotive engines, risesfrom the smoke box, in the usual way, and it is surrounded by a case, orjacket, of sheet iron extending' from its lower end to the same, ornearly the saine, height with it. Between the chimney and this outward.case, or jacket, there is a cylindrical body, or a conical frustum, ofwire gauze, or sheet metal perforated throughout with numerous holes,and of such diameter as to leave a space of several inches between itand the chimney, and between it and the outer case. Said cylinder, orcone, of perforated metal extends up to the same height with the jacket;and the space between them is covered by an annular cap, which serves tounite the two at their upper ends, and to inclo-se the space betweenthem. The perforated metal, or wire gauze, descends to the distance oftwo thirds, or three fourths, the length of the chimney, more or less,and at its lower end there is an annular pla-te which connects it withthe chimney, and closes the space between them. Below this point thespace between the jacket and the chimney constitutes a receptacle forsparks, cinders and ashes; and this is furnished with a door for theirremoval. The top of the chimney has a closely fitting cover adapted toit, which is to be kept closed when the engine is in action, but whichmay be opened when it is desirable to allow the draft to pass directlyup the chimney. There is an open, annular space between the top of thechimney and the intermediate cylinder, or cone, of perforated metal,through which opening the draft is to escape when the engine is inaction. Between the interior of the chimney, and the space between thejacket and the perforated metal, there are several, say three or four,pipes of communication, which extend across the space between thechimney and the perforated is a sectional view of my spark arrester,

standing on the smoke box, and Fig. 2 a top view thereof.

A, A, is the smoke box; B, B, the chimney; C, C, the outer case, orjacket. D, D,

the perforated metal, or wire gauze, surrounding the chimney. E, E, theannular, metallic plate covering the space between the jacket and theperforated metal. F, F, the annular plate inclosing the space betweenthe chimney and the perforated metal. G, the hinged cover of thechimney, which may be opened 0r closed by means of the rod II. I, I, thereceptacle for sparks, Sec., and J, the door for their removal.

K, K, are the tubes communicating between the chimney and the space L,L.

In Fig. 2, the same letters of reference are used to designate the saineparts. M, M, in this figure and in Fig. 1, are the escape openingsbetween the pipes K, K, for the draft.

From the foregoing description, the operation of this apparatus will bereadily understood. rlhe exhaust steam is to be discharged into thechimney in the usual way; and the cover G, being closed, the draft willbe forced through the tubes K, Ii, into the space L, L, where the sparksstriking against the interior of the jacket, will fall down into thereceptacle, or space, I, I; the

steam and smoke, with the gaseous products of combustion, will, by theirelasticity, be forced to pass thro-ugh the perforations in D, D, andescape at the openings M, M.

Having thus fully described the manner in which I construct my sparkarrester, and arrange and combine the respective parts thereof, I herebydeclare that I do not claim to be the first inventor of either of theseparate parts thereof, taken individually; but I do claim to have socombined and ar ranged these parts as to have produced an instrumentsubstantially new in its character and beneficial in its effects; thatis tO say- 5 I claim- The surrounding of the Chimney B, B, by theperforated metallic cylinder, or cone, D, D, and the jacket, or case, C,C, combining these parts together, and inclosing them, in the mannerherein set fort-h; the chimney being` furnished with a cover, Orshutter, and tubes, or pipes, Of Communication eX- tendingfrom saidchimney into the space L, L; and the other parts concerned in the actionof the apparatus being arranged substantially in the manner, and so asto produce the results, herein set forth.

In testimony whereof I hereunto sign my name this twelfth day of April1841.

WM. W. HUBBELL.

Witnesses:

Trios. I). JONES, JOHN C. JOHNSTON.

